I'd expect a 2011 Big Country to have a wall switch like the one marked "awning receptacle", that illuminates when switched on.
If you're getting 120V AC at the secondary (rocker) switch outside, in the lower left corner, then the electric side of the water heater is getting power, even if you can't find a switch inside. Try pressing the reset buttons on the water heater.
If that doesn't help, our
Water Heater Troubleshooting guide (assuming you have a Suburban unit), will step you through finding the failure, with photos and diagrams.